Created attachment 99094 [details]
Screenshot of the Options dialog
What's the meaning of the checkbox (Warn about) "Transparency" in the Options dialog (see attached screenshot)?
With OpenOffice 3.2.1, for example, when checked you got a warning "Your document contains transparent objects. This may lead to longer printing times on certain printers. Should the aspect of transperency be reduced?" when printing a document with transparend objects (and no such warning if unchecked).
In LO, you get no warning no matter if this checkbox is checked or unchecked. Furthermore, I can't find a corresponding text/dialog, and I can't find any evaluation of the checkbox. (The only calls to IsTransparency and SetTransparency are - as far as I can see - to set the checkboxes state correctly when the dialog is initialized.)
So if there really is no use of this setting, wouldn't it be better to remove the checkbox, in order not to confuse the users?
Created attachment 99095 [details]
Test document, containing a transparent image
Updating version to PreBibisect - confirmed this behavior is really really old.
Asking for devs input.
(1) Remove the transparency option from dialog.
(2) Submit as a bug that it's currently just broken
Component is ux-advise, so setting Status -> NEW.
Migrating Whiteboard tags to Keywords: (needAdvice)
We're replacing our use of the 'ux-advise' component with a keyword:
Component -> LibreOffice
Add Keyword: needsUXEval
[This is an automatic message]
Changing version to 22.214.171.124 in order to get rid of 'preBibisect' version as 126.96.36.199 looks to be the last version not covered by bibisect-43all.
'needsConfirmationAdvise' is only used for unconfirmed bugs. Removing it from this bug.
The control is connected to a function  like 'Paper size'. It likely checks whether the printer is able to deal with transparency or not, at least I don't see any reason why it shouldn't work. So we better keep it, although it's not clear how to invoke the message.
 IsTransparency() in https://opengrok.libreoffice.org/xref/core/unotools/source/config/printwarningoptions.cxx